SZHLUX’s PT4000 is a 400 W LED multi‑bar grow light featuring an onboard digital controller with 24‑hour timer and a temperature probe that can throttle output or shut the unit down at set thresholds. The fixture uses 864 Samsung diodes in a fanless aluminum chassis and is listed for a 4×4 ft coverage area. Its full‑spectrum mix combines 3000K and 5000K white with 660 nm deep red and 730 nm IR, with an overall color temperature listed around 3600 K. Physical dimensions are approximately 43.3 × 43.3 × 2.3 inches, and weight is about 4.5 kg. Designed for seedling through bloom, the PT4000 targets simple scheduling and thermal protection without external controllers.
